Anti Spam SMTP Gateway
Share a VPN connection with VMs or containers
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
OpenBSD based firewall distribution
An iptables IPv4 firewall and traffic shaping program
ipset set listing wrapper script
Programmable completion code (bash) for ip[6]tables (netfilter.org)
Block or allow connections by country address blocks
Open source voucher management / hotspot system
Linux firewall distribution geared towards home and SOHO users.
bash programmable completion for conntrack-tools (netfilter.org)
Programmable completion code (bash) for ipset (netfilter.org)
Easy to use firewall for linux beginners.
Easy Firewall Script